The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 07, 2023
Filed:
Dec. 04, 2020
Robert Bosch Gmbh, Stuttgart, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
The invention relates to a pressure-controlled shut-off valve () for temporarily interrupting the air supply to a fuel cell stack in a fuel cell system, comprising a valve piston () which can be moved back and forth in a cylindrical housing bore () and which is biased in the direction of a seal seat () by the spring force of a spring (), wherein a connection between an air inlet channel () and an air outlet channel () is produced or interrupted depending on the axial position of the valve piston (). According to the invention, the valve piston () delimits a spring chamber (), which receives the spring () and to which ambient pressure is applied, on one side and a control chamber (), which is connected to the air inlet channel (), on the other side within the housing bore (). The invention additionally relates to a fuel cell system comprising a shut-off valve () according to the invention.